Title:
ラック軸の製造方法
Document Type and Number:
Japanese Patent JP4852922
Kind Code:
B2
Abstract:
In a manufacturing method of a rack shaft, the rack shaft is formed by mounting a shaft raw material (A) on a receiving groove (21) of a lower mold (2), the receiving mold having an approximately U-shaped cross section, thereafter arranging an upper mold (4) having a rack-teeth-forming teeth portion (41a) formed in a rectangular shape in a bottom view and capable of oscillating in a width direction of the receiving groove (21) around a center in the width direction of the rack-teeth-forming teeth portion (41a), in such a manner that the center of oscillation lies on a vertical line of a center in a width direction of the rack teeth, pressing the shaft raw material (A) in the diametrical direction, deforming the shaft raw material (A) along the receiving groove (21), and thereafter deforming the shaft raw material (A) while oscillating the upper mold (4) so as to form a rack teeth.
Inventors:
Hiroyuki Omi
Ukai Kazuo
Ukai Kazuo
Application Number:
JP2005216128A
Publication Date:
January 11, 2012
Filing Date:
July 26, 2005
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
B21K1/76; B62D3/12
Domestic Patent References:
| JP58128242A | ||||
| JP9175412A | ||||
| JP8047741A |
Attorney, Agent or Firm:
Nobuo Kono